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Ideas what is causing this on some of the leaves?

Anyone have a design or know of something that will give me a light proof intake, need a couple passive intakes into my flower area but needs to be light proof. thanks!

Is there a current discount code out there for cobkits? thanks all

I built a 1000 watt Vero 29 fixture a couple weeks ago.. I decided to build 2 more. Here are the parts. Doing a 10 cob Vero 29 Gen 7 3000K C all 90 CRI and an all 80 CRI light. 5 of these Vero 29 Gen 7's C's 3000k 80 CRI - $30.28 each...

I know the lower wattage you run a cob the more efficient it becomes. But is the intensity of the light a factor as well? If I ran two cobs at 20 watts and a single cob at 40 watts, won't the intensity and penetration be better on the 40 watt than running 2 cobs at 20 watts each? If I take a...

I built a 1000 watt cob fixture last week and it turned out so well and it lights up and penetrates a 4 x 4 like I have never seen before so I decided to build two more. Here is other thread https://www.rollitup.org/t/my-1000-watt-vero-29-led-build-inspired-by-growmau5.937492/#post-13448278 I...

This is much more basic than growmau5's awesome Canopy 10 build but the layout and 8020 ideas I took from him (as well as pretty much everything I know about led's and cobs lol). I am familiar with 8020 though, I have a sim racing cockpit I made from 8020 extrusions.. good stuff! I upgrade my...

Hey all, I just received my par meter I ordered from rapidled.. this one here http://www.rapidled.com/apogee-sq-120-quantum-sensor/ I have it hooked to my meter and set to dc millivolt. I tested with a 4 cob vero 29 fixture I have here over some plants vegging running at ~75 watts per cob.. I...

Can I solder a single dimmer to two different mean well drivers? This fine to do anyone know? thanks!

the one without wings did have wings, was holding it by the wings and it pulled itself free by ripping its own wings off lol

nm, got answer

I ordered 4 drivers today, 2 of which were HLG-320H-C2100B's, they said they were in stock when ordered now receive an email saying that they are not in stock. Seems no one has these in stock for some reason. Where can I get two of these or what are some alternative brands/models that do the...

I just ordered a couple mean well hlg 320 2100B drivers and need to order some dimmers for them, which dimmers should I be ordering? There a link on how to wire them properly somewhere? thanks all

Will these work as decent veg lights? Nothing seems to be in stock from the normal places, but digikey has these ones.. these considered top bin? BXRC-40E10K0-D-73 http://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=220534482&uq=636239065213321906 I could drive 4 of these with a...

I just ordered one of these to try out, has anyone used one before? I am looking to replace my 1000 hps fixtures, I have replaced a few with cree cob builds and have been happy with the results but these being less than half the cost per 4 x 4 tray of the led's has me interested. I am not sure...

I am curious if anyone is growing via VPD chart in a perpetual flower room, if so is the higher temp/humidity an issue in late flower?

I purchased a rosin press and am wondering what bags are you guys using? What micron are you using for flower, how about sugar trim? Which specific bags are you using? thanks all

I am trying out jacks 3 2 1, using jacks, calcium nitrate, epson salt, sea green hydro and silicia. These are veg plants in coco ph has been between 5.9 and 6.1, have been getting jacks for about a week now. This is starting to show up on a few leaves. ideas?

I have not replaced my MH 600 watt veg light bulbs in like 2 years, I think its over due at this point.. what are some recommended 600 watt veg bulbs these days?

Hey all, anyone have any tips on growing cheese? I have had two different exodus cheese strains (one I have grown from seed, other a cut from a friend) and also chucky's bride, which has cheese in it. I am suffering from yellowing with anything that has cheese in it. Does it need more or less...